to honor those firefighters who died. today's arrest shows howseriouslylawenforcementis about going after anyone in trying to prosecute them, who are connected with this terrible crime, even though, david, the shooter himself is dead. >> such a horrific plot. ron, thanks to you. >>> with millions of americans on vacation this holiday, an unwelcome headline for hundreds of apparentlies on -- passengers on two separate cruise ships. their holiday trips turned into a nightmare when many of them became very sick. matt gutman is in miami. >> reporter: it advertises comfort, luxury, and fine dining. >> now sailing on the grandest ocean liner ever, the "queen mary 2." >> reporter: but now the colossal ocean liner is one of three cruises just this week to be rocked by mass outbreaks of the stomach flu. 194 "queen mary" passengers reported contracting the bug, believed to be the highly contagious norovirus. >> it can even resist most of the disinfectants that are normally used to clean environmental surfaces. >> reporter: so you can just touch something like this and put it to your mouth and

shows howseriouslylawenforcementis going after anyone connected to the terrible crime even though the shooter is dead tonight. >> ron, thanks to you. >>> with millions of americans on vacation this holiday, an unwelcome headline for passengers on a cruise ship. their holiday trips turned into a nightmare when many of them became very sick. >> reporter: it advertises comfort, luxury and haute cuisine. >> now sailing on the grandest ocean liner ever, the "queen mary 2." >> reporter: but now the colossal ocean liner is one of three cruises just this week to be rocked by mass outbreaks of the stomach flu. 194 "queen mary" passengers reported contracting the bug, believed to be the highly contagious norovirus. ngets it can even resist most of the disinfectants that are normally used to clean environmental surfaces. >> so you can touch something like this and put it to your mouth and get the virus? >> right. >> reporter: and, tonight, the -- there's no treatment. the captain suggested they stay clear of the buff eight. tonight the cdc is investigating why nearly 200 people were stricken